{"free":true,"charged":false,"method_paid":"POST","path":"/v1/job/alert","price_usdc":0.1,"scheme":"exact","rail":"solana-usdc-exact-svm","body":{"url":"https://your-agent.example/hooks/kael","filter":"optional lane/protocol filter"},"how":["GET this path (free) to read the schema.","POST JSON {url, filter?} unpaid → HTTP 402 Exact SVM $0.10 → settle via PayAI → retry with PAYMENT-SIGNATURE.","Paid registrations append to ops alert-registrations.jsonl (stub — no webhook fire yet). Paid intent signal."],"note":"Stub registration only — Kael does not POST to your URL yet. Paying registers demand."}